199767f8919635c4928607450d9e0abb932109ceToomas Soome/*-
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Copyright (c) 2003 Jake Burkholder.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Copyright 1996-1998 John D. Polstra.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Copyright (c) 1998 Peter Wemm <peter@freebsd.org>
199767f8919635c4928607450d9e0abb932109ceToomas Soome * All rights reserved.
199767f8919635c4928607450d9e0abb932109ceToomas Soome *
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Redistribution and use in source and binary forms, with or without
199767f8919635c4928607450d9e0abb932109ceToomas Soome * modification, are permitted provided that the following conditions
199767f8919635c4928607450d9e0abb932109ceToomas Soome * are met:
199767f8919635c4928607450d9e0abb932109ceToomas Soome * 1. Redistributions of source code must retain the above copyright
199767f8919635c4928607450d9e0abb932109ceToomas Soome * notice, this list of conditions and the following disclaimer.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * 2. Redistributions in binary form must reproduce the above copyright
199767f8919635c4928607450d9e0abb932109ceToomas Soome * notice, this list of conditions and the following disclaimer in the
199767f8919635c4928607450d9e0abb932109ceToomas Soome * documentation and/or other materials provided with the distribution.
199767f8919635c4928607450d9e0abb932109ceToomas Soome *
199767f8919635c4928607450d9e0abb932109ceToomas Soome * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
199767f8919635c4928607450d9e0abb932109ceToomas Soome * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
199767f8919635c4928607450d9e0abb932109ceToomas Soome * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
199767f8919635c4928607450d9e0abb932109ceToomas Soome * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
199767f8919635c4928607450d9e0abb932109ceToomas Soome * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
199767f8919635c4928607450d9e0abb932109ceToomas Soome * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
199767f8919635c4928607450d9e0abb932109ceToomas Soome * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
199767f8919635c4928607450d9e0abb932109ceToomas Soome * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
199767f8919635c4928607450d9e0abb932109ceToomas Soome * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
199767f8919635c4928607450d9e0abb932109ceToomas Soome * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
199767f8919635c4928607450d9e0abb932109ceToomas Soome * SUCH DAMAGE.
199767f8919635c4928607450d9e0abb932109ceToomas Soome */
199767f8919635c4928607450d9e0abb932109ceToomas Soome
199767f8919635c4928607450d9e0abb932109ceToomas Soome#include <sys/cdefs.h>
199767f8919635c4928607450d9e0abb932109ceToomas Soome__FBSDID("$FreeBSD$");
199767f8919635c4928607450d9e0abb932109ceToomas Soome
199767f8919635c4928607450d9e0abb932109ceToomas Soome#include <sys/types.h>
199767f8919635c4928607450d9e0abb932109ceToomas Soome#include <machine/elf.h>
199767f8919635c4928607450d9e0abb932109ceToomas Soome
199767f8919635c4928607450d9e0abb932109ceToomas Soome#include <stand.h>
199767f8919635c4928607450d9e0abb932109ceToomas Soome
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define FREEBSD_ELF
199767f8919635c4928607450d9e0abb932109ceToomas Soome#include <link.h>
199767f8919635c4928607450d9e0abb932109ceToomas Soome
199767f8919635c4928607450d9e0abb932109ceToomas Soome#include "bootstrap.h"
199767f8919635c4928607450d9e0abb932109ceToomas Soome
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define COPYOUT(s,d,l) archsw.arch_copyout((vm_offset_t)(s), d, l)
199767f8919635c4928607450d9e0abb932109ceToomas Soome
199767f8919635c4928607450d9e0abb932109ceToomas Soome/*
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Apply a single intra-module relocation to the data. `relbase' is the
199767f8919635c4928607450d9e0abb932109ceToomas Soome * target relocation base for the section (i.e. it corresponds to where
199767f8919635c4928607450d9e0abb932109ceToomas Soome * r_offset == 0). `dataaddr' is the relocated address corresponding to
199767f8919635c4928607450d9e0abb932109ceToomas Soome * the start of the data, and `len' is the number of bytes.
199767f8919635c4928607450d9e0abb932109ceToomas Soome */
199767f8919635c4928607450d9e0abb932109ceToomas Soomeint
199767f8919635c4928607450d9e0abb932109ceToomas Soome__elfN(reloc)(struct elf_file *ef, symaddr_fn *symaddr, const void *reldata,
199767f8919635c4928607450d9e0abb932109ceToomas Soome int reltype, Elf_Addr relbase, Elf_Addr dataaddr, void *data, size_t len)
199767f8919635c4928607450d9e0abb932109ceToomas Soome{
199767f8919635c4928607450d9e0abb932109ceToomas Soome#ifdef __sparc__
199767f8919635c4928607450d9e0abb932109ceToomas Soome Elf_Size w;
199767f8919635c4928607450d9e0abb932109ceToomas Soome const Elf_Rela *a;
199767f8919635c4928607450d9e0abb932109ceToomas Soome
199767f8919635c4928607450d9e0abb932109ceToomas Soome switch (reltype) {
199767f8919635c4928607450d9e0abb932109ceToomas Soome case ELF_RELOC_RELA:
199767f8919635c4928607450d9e0abb932109ceToomas Soome a = reldata;
199767f8919635c4928607450d9e0abb932109ceToomas Soome if (relbase + a->r_offset >= dataaddr &&
199767f8919635c4928607450d9e0abb932109ceToomas Soome relbase + a->r_offset < dataaddr + len) {
199767f8919635c4928607450d9e0abb932109ceToomas Soome switch (ELF_R_TYPE(a->r_info)) {
199767f8919635c4928607450d9e0abb932109ceToomas Soome case R_SPARC_RELATIVE:
199767f8919635c4928607450d9e0abb932109ceToomas Soome w = relbase + a->r_addend;
199767f8919635c4928607450d9e0abb932109ceToomas Soome bcopy(&w, (u_char *)data + (relbase +
199767f8919635c4928607450d9e0abb932109ceToomas Soome a->r_offset - dataaddr), sizeof(w));
199767f8919635c4928607450d9e0abb932109ceToomas Soome break;
199767f8919635c4928607450d9e0abb932109ceToomas Soome default:
199767f8919635c4928607450d9e0abb932109ceToomas Soome printf("\nunhandled relocation type %u\n",
199767f8919635c4928607450d9e0abb932109ceToomas Soome (u_int)ELF_R_TYPE(a->r_info));
199767f8919635c4928607450d9e0abb932109ceToomas Soome return (EFTYPE);
199767f8919635c4928607450d9e0abb932109ceToomas Soome }
199767f8919635c4928607450d9e0abb932109ceToomas Soome }
199767f8919635c4928607450d9e0abb932109ceToomas Soome break;
199767f8919635c4928607450d9e0abb932109ceToomas Soome }
199767f8919635c4928607450d9e0abb932109ceToomas Soome
199767f8919635c4928607450d9e0abb932109ceToomas Soome return (0);
199767f8919635c4928607450d9e0abb932109ceToomas Soome#elif (defined(__i386__) || defined(__amd64__)) && __ELF_WORD_SIZE == 64
199767f8919635c4928607450d9e0abb932109ceToomas Soome Elf64_Addr *where, val;
199767f8919635c4928607450d9e0abb932109ceToomas Soome Elf_Addr addend, addr;
199767f8919635c4928607450d9e0abb932109ceToomas Soome Elf_Size rtype, symidx;
199767f8919635c4928607450d9e0abb932109ceToomas Soome const Elf_Rel *rel;
199767f8919635c4928607450d9e0abb932109ceToomas Soome const Elf_Rela *rela;
199767f8919635c4928607450d9e0abb932109ceToomas Soome
199767f8919635c4928607450d9e0abb932109ceToomas Soome switch (reltype) {
199767f8919635c4928607450d9e0abb932109ceToomas Soome case ELF_RELOC_REL:
199767f8919635c4928607450d9e0abb932109ceToomas Soome rel = (const Elf_Rel *)reldata;
199767f8919635c4928607450d9e0abb932109ceToomas Soome where = (Elf_Addr *)((char *)data + relbase + rel->r_offset -
199767f8919635c4928607450d9e0abb932109ceToomas Soome dataaddr);
199767f8919635c4928607450d9e0abb932109ceToomas Soome addend = 0;
199767f8919635c4928607450d9e0abb932109ceToomas Soome rtype = ELF_R_TYPE(rel->r_info);
199767f8919635c4928607450d9e0abb932109ceToomas Soome symidx = ELF_R_SYM(rel->r_info);
199767f8919635c4928607450d9e0abb932109ceToomas Soome addend = 0;
199767f8919635c4928607450d9e0abb932109ceToomas Soome break;
199767f8919635c4928607450d9e0abb932109ceToomas Soome case ELF_RELOC_RELA:
199767f8919635c4928607450d9e0abb932109ceToomas Soome rela = (const Elf_Rela *)reldata;
199767f8919635c4928607450d9e0abb932109ceToomas Soome where = (Elf_Addr *)((char *)data + relbase + rela->r_offset -
199767f8919635c4928607450d9e0abb932109ceToomas Soome dataaddr);
199767f8919635c4928607450d9e0abb932109ceToomas Soome addend = rela->r_addend;
199767f8919635c4928607450d9e0abb932109ceToomas Soome rtype = ELF_R_TYPE(rela->r_info);
199767f8919635c4928607450d9e0abb932109ceToomas Soome symidx = ELF_R_SYM(rela->r_info);
199767f8919635c4928607450d9e0abb932109ceToomas Soome break;
199767f8919635c4928607450d9e0abb932109ceToomas Soome default:
199767f8919635c4928607450d9e0abb932109ceToomas Soome return (EINVAL);
199767f8919635c4928607450d9e0abb932109ceToomas Soome }
199767f8919635c4928607450d9e0abb932109ceToomas Soome
199767f8919635c4928607450d9e0abb932109ceToomas Soome if ((char *)where < (char *)data || (char *)where >= (char *)data + len)
199767f8919635c4928607450d9e0abb932109ceToomas Soome return (0);
199767f8919635c4928607450d9e0abb932109ceToomas Soome
199767f8919635c4928607450d9e0abb932109ceToomas Soome if (reltype == ELF_RELOC_REL)
199767f8919635c4928607450d9e0abb932109ceToomas Soome addend = *where;
199767f8919635c4928607450d9e0abb932109ceToomas Soome
199767f8919635c4928607450d9e0abb932109ceToomas Soome/* XXX, definitions not available on i386. */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define R_X86_64_64 1
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define R_X86_64_RELATIVE 8
199767f8919635c4928607450d9e0abb932109ceToomas Soome
199767f8919635c4928607450d9e0abb932109ceToomas Soome switch (rtype) {
199767f8919635c4928607450d9e0abb932109ceToomas Soome case R_X86_64_64: /* S + A */
199767f8919635c4928607450d9e0abb932109ceToomas Soome addr = symaddr(ef, symidx);
199767f8919635c4928607450d9e0abb932109ceToomas Soome if (addr == 0)
199767f8919635c4928607450d9e0abb932109ceToomas Soome return (ESRCH);
199767f8919635c4928607450d9e0abb932109ceToomas Soome val = addr + addend;
199767f8919635c4928607450d9e0abb932109ceToomas Soome *where = val;
199767f8919635c4928607450d9e0abb932109ceToomas Soome break;
199767f8919635c4928607450d9e0abb932109ceToomas Soome case R_X86_64_RELATIVE:
199767f8919635c4928607450d9e0abb932109ceToomas Soome addr = (Elf_Addr)addend + relbase;
199767f8919635c4928607450d9e0abb932109ceToomas Soome val = addr;
199767f8919635c4928607450d9e0abb932109ceToomas Soome *where = val;
199767f8919635c4928607450d9e0abb932109ceToomas Soome break;
199767f8919635c4928607450d9e0abb932109ceToomas Soome default:
199767f8919635c4928607450d9e0abb932109ceToomas Soome printf("\nunhandled relocation type %u\n", (u_int)rtype);
199767f8919635c4928607450d9e0abb932109ceToomas Soome return (EFTYPE);
199767f8919635c4928607450d9e0abb932109ceToomas Soome }
199767f8919635c4928607450d9e0abb932109ceToomas Soome
199767f8919635c4928607450d9e0abb932109ceToomas Soome return (0);
199767f8919635c4928607450d9e0abb932109ceToomas Soome#elif defined(__i386__) && __ELF_WORD_SIZE == 32
199767f8919635c4928607450d9e0abb932109ceToomas Soome Elf_Addr addend, addr, *where, val;
199767f8919635c4928607450d9e0abb932109ceToomas Soome Elf_Size rtype, symidx;
199767f8919635c4928607450d9e0abb932109ceToomas Soome const Elf_Rel *rel;
199767f8919635c4928607450d9e0abb932109ceToomas Soome const Elf_Rela *rela;
199767f8919635c4928607450d9e0abb932109ceToomas Soome
199767f8919635c4928607450d9e0abb932109ceToomas Soome switch (reltype) {
199767f8919635c4928607450d9e0abb932109ceToomas Soome case ELF_RELOC_REL:
199767f8919635c4928607450d9e0abb932109ceToomas Soome rel = (const Elf_Rel *)reldata;
199767f8919635c4928607450d9e0abb932109ceToomas Soome where = (Elf_Addr *)((char *)data + relbase + rel->r_offset -
199767f8919635c4928607450d9e0abb932109ceToomas Soome dataaddr);
199767f8919635c4928607450d9e0abb932109ceToomas Soome addend = 0;
199767f8919635c4928607450d9e0abb932109ceToomas Soome rtype = ELF_R_TYPE(rel->r_info);
199767f8919635c4928607450d9e0abb932109ceToomas Soome symidx = ELF_R_SYM(rel->r_info);
199767f8919635c4928607450d9e0abb932109ceToomas Soome addend = 0;
199767f8919635c4928607450d9e0abb932109ceToomas Soome break;
199767f8919635c4928607450d9e0abb932109ceToomas Soome case ELF_RELOC_RELA:
199767f8919635c4928607450d9e0abb932109ceToomas Soome rela = (const Elf_Rela *)reldata;
199767f8919635c4928607450d9e0abb932109ceToomas Soome where = (Elf_Addr *)((char *)data + relbase + rela->r_offset -
199767f8919635c4928607450d9e0abb932109ceToomas Soome dataaddr);
199767f8919635c4928607450d9e0abb932109ceToomas Soome addend = rela->r_addend;
199767f8919635c4928607450d9e0abb932109ceToomas Soome rtype = ELF_R_TYPE(rela->r_info);
199767f8919635c4928607450d9e0abb932109ceToomas Soome symidx = ELF_R_SYM(rela->r_info);
199767f8919635c4928607450d9e0abb932109ceToomas Soome break;
199767f8919635c4928607450d9e0abb932109ceToomas Soome default:
199767f8919635c4928607450d9e0abb932109ceToomas Soome return (EINVAL);
199767f8919635c4928607450d9e0abb932109ceToomas Soome }
199767f8919635c4928607450d9e0abb932109ceToomas Soome
199767f8919635c4928607450d9e0abb932109ceToomas Soome if ((char *)where < (char *)data || (char *)where >= (char *)data + len)
199767f8919635c4928607450d9e0abb932109ceToomas Soome return (0);
199767f8919635c4928607450d9e0abb932109ceToomas Soome
199767f8919635c4928607450d9e0abb932109ceToomas Soome if (reltype == ELF_RELOC_REL)
199767f8919635c4928607450d9e0abb932109ceToomas Soome addend = *where;
199767f8919635c4928607450d9e0abb932109ceToomas Soome
199767f8919635c4928607450d9e0abb932109ceToomas Soome/* XXX, definitions not available on amd64. */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define R_386_32 1 /* Add symbol value. */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define R_386_GLOB_DAT 6 /* Set GOT entry to data address. */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define R_386_RELATIVE 8 /* Add load address of shared object. */
199767f8919635c4928607450d9e0abb932109ceToomas Soome
199767f8919635c4928607450d9e0abb932109ceToomas Soome switch (rtype) {
199767f8919635c4928607450d9e0abb932109ceToomas Soome case R_386_RELATIVE:
199767f8919635c4928607450d9e0abb932109ceToomas Soome addr = addend + relbase;
199767f8919635c4928607450d9e0abb932109ceToomas Soome *where = addr;
199767f8919635c4928607450d9e0abb932109ceToomas Soome break;
199767f8919635c4928607450d9e0abb932109ceToomas Soome case R_386_32: /* S + A */
199767f8919635c4928607450d9e0abb932109ceToomas Soome addr = symaddr(ef, symidx);
199767f8919635c4928607450d9e0abb932109ceToomas Soome if (addr == 0)
199767f8919635c4928607450d9e0abb932109ceToomas Soome return (ESRCH);
199767f8919635c4928607450d9e0abb932109ceToomas Soome val = addr + addend;
199767f8919635c4928607450d9e0abb932109ceToomas Soome *where = val;
199767f8919635c4928607450d9e0abb932109ceToomas Soome break;
199767f8919635c4928607450d9e0abb932109ceToomas Soome default:
199767f8919635c4928607450d9e0abb932109ceToomas Soome printf("\nunhandled relocation type %u\n", (u_int)rtype);
199767f8919635c4928607450d9e0abb932109ceToomas Soome return (EFTYPE);
199767f8919635c4928607450d9e0abb932109ceToomas Soome }
199767f8919635c4928607450d9e0abb932109ceToomas Soome
199767f8919635c4928607450d9e0abb932109ceToomas Soome return (0);
199767f8919635c4928607450d9e0abb932109ceToomas Soome#elif defined(__powerpc__)
199767f8919635c4928607450d9e0abb932109ceToomas Soome Elf_Size w;
199767f8919635c4928607450d9e0abb932109ceToomas Soome const Elf_Rela *rela;
199767f8919635c4928607450d9e0abb932109ceToomas Soome
199767f8919635c4928607450d9e0abb932109ceToomas Soome switch (reltype) {
199767f8919635c4928607450d9e0abb932109ceToomas Soome case ELF_RELOC_RELA:
199767f8919635c4928607450d9e0abb932109ceToomas Soome rela = reldata;
199767f8919635c4928607450d9e0abb932109ceToomas Soome if (relbase + rela->r_offset >= dataaddr &&
199767f8919635c4928607450d9e0abb932109ceToomas Soome relbase + rela->r_offset < dataaddr + len) {
199767f8919635c4928607450d9e0abb932109ceToomas Soome switch (ELF_R_TYPE(rela->r_info)) {
199767f8919635c4928607450d9e0abb932109ceToomas Soome case R_PPC_RELATIVE:
199767f8919635c4928607450d9e0abb932109ceToomas Soome w = relbase + rela->r_addend;
199767f8919635c4928607450d9e0abb932109ceToomas Soome bcopy(&w, (u_char *)data + (relbase +
199767f8919635c4928607450d9e0abb932109ceToomas Soome rela->r_offset - dataaddr), sizeof(w));
199767f8919635c4928607450d9e0abb932109ceToomas Soome break;
199767f8919635c4928607450d9e0abb932109ceToomas Soome default:
199767f8919635c4928607450d9e0abb932109ceToomas Soome printf("\nunhandled relocation type %u\n",
199767f8919635c4928607450d9e0abb932109ceToomas Soome (u_int)ELF_R_TYPE(rela->r_info));
199767f8919635c4928607450d9e0abb932109ceToomas Soome return (EFTYPE);
199767f8919635c4928607450d9e0abb932109ceToomas Soome }
199767f8919635c4928607450d9e0abb932109ceToomas Soome }
199767f8919635c4928607450d9e0abb932109ceToomas Soome break;
199767f8919635c4928607450d9e0abb932109ceToomas Soome }
199767f8919635c4928607450d9e0abb932109ceToomas Soome
199767f8919635c4928607450d9e0abb932109ceToomas Soome return (0);
199767f8919635c4928607450d9e0abb932109ceToomas Soome#else
199767f8919635c4928607450d9e0abb932109ceToomas Soome (void)ef;
199767f8919635c4928607450d9e0abb932109ceToomas Soome (void)symaddr;
199767f8919635c4928607450d9e0abb932109ceToomas Soome (void)reldata;
199767f8919635c4928607450d9e0abb932109ceToomas Soome (void)reltype;
199767f8919635c4928607450d9e0abb932109ceToomas Soome (void)relbase;
199767f8919635c4928607450d9e0abb932109ceToomas Soome (void)dataaddr;
199767f8919635c4928607450d9e0abb932109ceToomas Soome (void)data;
199767f8919635c4928607450d9e0abb932109ceToomas Soome (void)len;
199767f8919635c4928607450d9e0abb932109ceToomas Soome return (EOPNOTSUPP);
199767f8919635c4928607450d9e0abb932109ceToomas Soome#endif
199767f8919635c4928607450d9e0abb932109ceToomas Soome}